Sienna Miller barred from ballet

The actress was expected to accompany fiancé Jude Law to watch the nine-year-old youngster's dance performance but his ex-wife - with who he also has sons Rafferty, 13, and Rudy, seven - is refusing to allow her to join the family day.

A source said: "Jude was brining Sienna to the recital to support Iris but Sadie has had enough and put her foot down and said she could not come.

"Sadie is a great mum, she's just had enough of someone else playing mum with her children."

The 45-year-old designer is also said to be annoyed over plans for a summer wedding between Jude and Sienna, in which the 'Factory Girl' star is keen to involve the actor's children, despite the 'Alfie' star's attempts to mediate between the warring women.

Another source added to the Mail Online website: "There are many things that Sadie is cross about at the moment. Sienna is making all these plans for Sadie's children to be part of the wedding party.

"Jude asked Sadie if she could have an informal meeting with Sienna to smooth over their relationship for the sake of the children."

Sadie was infuriated recently after Sienna took Rudy to have his hair cut without her permission.

She posted on her twitter page: "I think ya should get ya own child and then cut their hair.(sic)"